IS220PCAAH1B - Core Analog Module

SPECIFICATIONS

Part No.: IS220PCAAH1B
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 33.0 cm high x 17.8 cm wide
Technology: Surface mount
Temperature: -30 to 65oC
Product Type: Core Analog Module
Availability: In Stock
Series: Mark VIe

Functional Description

IS220PCAAH1B is a core analog module developed by GE. It is a part of Mark VIe control system. The Core Analog (PCAA) module and optional Core Analog (TCAT) terminal board form an integral part of the gas turbine control system, providing essential analog signal processing and distribution capabilities. With a diverse range of signal I/O functionalities, robust connectivity options, and integrated module design, these components contribute to the efficient and reliable operation of the system.

Signal I/O Capabilities

• The thermocouple inputs allow for accurate temperature measurement at various critical points within the turbine system. Accurate temperature monitoring is vital for maintaining optimal operating conditions, and ensuring the safety and efficiency of the turbine's performance.
• The 4-20 mA current loop I/O capability is a standard in industrial automation for transmitting analog signals over long distances with high noise immunity. This feature allows the PCAA module to interface with a wide variety of sensors and actuators, providing both input and output functionalities. It ensures reliable communication of analog signals in challenging industrial environments.
• The seismic inputs capability of the module enables the monitoring of vibrations and seismic activity, which are crucial for detecting potential mechanical issues or structural integrity problems within the turbine system. This helps in early diagnosis and preventive maintenance, thus reducing the risk of unexpected failures.
• The module also supports Linear Variable Differential Transformer (LVDT) excitation and inputs. LVDTs are used for precise position sensing, and their signals are critical in applications where accurate position feedback is required, such as in the control of turbine blade positions and other movable components.
• Pulse rate inputs are another significant capability of the PCAA module. These inputs allow the module to measure the frequency of pulses, which can be used to monitor rotational speeds, flow rates, and other parameters that are essential for the efficient operation of the gas turbine.
• Additionally, the servo coil output functionality of the module allows it to control servo motors and actuators, which are used for precise control of various mechanical components in the turbine system. This capability is essential for maintaining precise control over the turbine's operations and ensuring that all components function harmoniously.
• The PCAA module is versatile and can be applied in both simplex and Triple Modular Redundancy (TMR) systems. This versatility provides flexibility to accommodate different system configurations and requirements. In simplex systems, a single module handles all the signal processing tasks, whereas in TMR systems, three modules work in parallel to provide higher reliability and fault tolerance, which is critical for mission-critical applications where downtime or failures can have significant consequences.
• The TCAT terminal board plays a crucial role in facilitating efficient signal distribution and management within the system. It fans out signal inputs to one or three connected PCAA modules, depending on the system configuration. This functionality ensures that the analog signals are properly distributed to the PCAA modules for processing, which enhances the overall efficiency and reliability of the gas turbine control system. The terminal board's design allows for streamlined connectivity and simplifies the wiring process, reducing the complexity of installation and maintenance.

Connectivity and Integration

• Terminal Supplement: The shield ground and 24 V field power terminals on an adjacent JGPA board complement the terminals on the PCAA and TCAT, enhancing connectivity and power distribution capabilities.
• Module Components: The PCAA module comprises a BPPx processor board, two application I/O boards, and a TCAS terminal board. This integrated setup is considered the least replaceable unit, providing a cohesive and compact solution for analog signal processing.
• Diagnostic and Replacement: It's important to note that there is no support provided to diagnose or replace individual boards within the PCAA module. This emphasizes the module's holistic design approach, focusing on overall functionality and reliability rather than individual component serviceability.
• Input and Power Connections: Input to the module is facilitated through dual RJ-45 Ethernet connectors and a 28 V DC power connector (P5), ensuring convenient and standardized connectivity. Field device I/O is achieved through 120 Euro-style box-type terminal blocks located on the module edge. Power for a JGPA board is supplied through connector P4. Additionally, module connection to TCAT is established through two 68-pin cables on connectors P1 and P2, facilitating seamless integration and communication between the components.

Design Features

• The design of the PCAA (Core Analog) module is meticulously crafted to fulfill specific operational requirements within the gas turbine control system.
• The module is ingeniously composed of four distinct circuit boards seamlessly integrated into a single physical assembly. These boards work in concert to handle various aspects of analog signal processing, ensuring a cohesive and compact design.
• The module is strategically considered the least replaceable unit within the system. This designation is attributed to the intricacy of the module's interconnections and the challenge of isolating a failure to a single board. Due to this complexity, the design emphasizes the integrity of the entire module rather than individual board replacement.
• The decision not to design the module for the replacement of individual boards stems from the difficulty in isolating failures to a single board. Acknowledging this challenge, the design prioritizes system stability and performance over the convenience of individual board replacement.
• The integration of multiple circuit boards within a single module promotes operational efficiency by streamlining signal processing and minimizing points of potential failure.

The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS220PCAAH1B?
It is a core analog module developed by GE under the Mark VIe series.

What is the module, and why is it considered the least replaceable unit?
The PCAA (Core Analog) module is a critical component of the gas turbine control system, comprising four separate circuit boards in a single physical assembly. It is designated as the least replaceable unit due to the complexity of isolating failures to a single board within the module.

Why is the module not designed for the replacement of individual boards?
The decision not to design for individual board replacement is primarily based on the difficulty of isolating failures to a single board. The integration of multiple boards into a single assembly emphasizes the integrity of the entire module rather than individual board serviceability.

What is the philosophy behind the holistic approach to the module design?
The design prioritizes system-wide reliability and efficiency. By consolidating multiple circuit boards into a single assembly, the module minimizes potential failure points, promotes operational efficiency, and enhances overall system robustness.

Are there any operational considerations related to the design of the PCAA?
Yes, operational considerations include limited diagnostic support for isolating faults to specific boards within the module. This underscores the importance of comprehensive testing and quality assurance during manufacturing and integration to ensure optimal performance.